Harken Pulley 57 mm

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. The sheave center carries primary load, allowing a smaller, lighter weight block. The soft-attachment Loop block has a removable deadend post for attachment to a padeye. Lashings can also be used.


Specifications:

- Sheave Ø (mm): 57 mm
- Sheave Ø (in): 2 1/4 in
- Length (mm): 76 mm
- Length (in): 3 in
- Weight (g): 92 g
- Weight (oz): 3.23 oz
- Maximum line Ø (mm): 12 mm
- Maximum line Ø (in): 7/16 in
- Maximum working load (kg): 1134 kg
- Maximum working load (lb): 2500 lb
- Breaking load (kg): 2268 kg
- Breaking load (lb): 5000 lb